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product. The MeAl describcs the ullsafe condition as: authority of another country to identify and conect an unsafe condilion all an aviation mandatory continuing airworthiness infoll11atlol1 (MeAl) originalcd byan aviation listed above that would supersede an existing AD. This proposed AD results frolll ACTION: Notice ofproposed rulemaking (NPRM). AGENCY: Federal Aviation Administration (FAA). DOT. Airplanes IDocket No. FAA-2009-*~*"'*; Directorate Identifier 2008-NM-169-ADI Federal Aviation Administration

SU1\JIMARY: We propose to adopt anew airworthiness directive (AD) rOT the product and -300A Series Airplanes, and Model Avro 146-RJ70A, 146-RIS5A, and 146-RJIOO Airworthiness Directives; 8M SYSTEMS (Operations) Limitedfr-ype..Geflif~ateRIN 2120-AA64 DEPARTMENT OF TRANSPORTA nON
14CFR Par' 39

--Pffl¥iousLy...Hcld-b¥-3Rtish-Aemspace"'Regional Aircraftt Model BAe 146... 1OOA,-10DA

In 1991, the UK Civil Aviation Authority (CAA) issued AD 015-08-91 [which corresponds to FAA .W 93-01-111, requiring the accomplishment ofinspections of, and incase ofcrack findings, con-cctivc actions Ollo the wing top skin atrib '0' ofpre-modification HCM0085 IC BAe 1-\.6series aircraft in accordance with British Aerospace Service Bulletin (SB) 57-41 dated 26 July 1991_Recently, BAE Systems (Operations) Ltd has detcmlined that arevised inspection programme for the wing top skin and joint strap at rib '0' Oil all BAe 146 and AVRO 146-RJ aircraft is necessary to assure the continued slrucIllral integrity ofthis area_Cracking oflhe wing centre section top skin, ifundctected, could lead 10 structural failure and consequent loss ofthe aircrafi. ~,nmw.",,, •.•~--1491O-13-PJ DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14CFR Part 39 IDocket No. FAA-2009-*****; Directorate Identifier 2008-NM-169-AD) RIN 2120-AA64 Airworthiness Directives; BAE Systems (Operations) Limited ModeJ SAe 146-1aOA, II~ 

## l4--'lcfi -200A, and -300A Series Airplanes, and Mode! Avro 146-RJ70A, 14G-RJ85A, and ~O\l'IIM,'~I"t11. 146-RJI00A Airplanes. AGENCY: Federal Aviation Administration (FAA). DOT. ACTION: Notice ofproposed rulemaking (NPRM). SUMMARY: We propose to adopt anew airworthiness directive (AD) forthe product listed above that would supersede an existing AD. This proposed AD results from mandatory continuing airworthiness infomlation (MC'Al) originated by an aviation authority ofanother country to identify and correct an unsafe condition on an aviation product. The MeAl describes the unsafe condition as: In 1991, the UK Civil Aviation Authority (CAA) issued AD 015-08-91 [which con'e-sponds to FAA.AD 93-0I-II 

## J, requiring the accomplishment ofinspections of, and incase ofcrack findings, corrective aClions on, the wing top skin at rib -0' ofpre-modification HCM00851C BAe 146 series aircran in accordance with British Aerospace Service Bulletin (SB) 57-41 dated 26 July 1991. Recently, BAE Systems (Operations) Ltd has detcnnined that arevised inspection programme for the wing top skin and joint strap at rib '0' on all BAe 146 and AVRO 146~RJaircraft is necessary to assure the continued structural integrity ofthis area. Cracking ofthe wing centre section top skin, ifundetected, could lead to structural failure and consequent loss ofthe aircraft. "ME 

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